Ultra Grand Slam Sport Fishing 

4.6/5 (37 reviews)
 
State licensed
 North Roosevelt Boulevard, Key West, FL 33040, United States

Ultra Grand Slam Sport Fishing 

State licensed
Key West, FL, United States
48 ft
6
4.6/5 (37 reviews)

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Ride in comfort aboard one of the largest charter boats at charter boat row!

Ultra Grand Slam Sport Fishing Charters and Captain Magnus Nilsson invite you down to Key West for an adventure of a lifetime. The company specializes in inshore, offshore, wrecks, and reef fishing trips that are great for seasoned enthusiasts and record-seekers alike.

Captain Magnus loves catching fish and having a great time on the water. The first mate will cater to your every need. We customize our trips to maximize your pleasure.

Whether you want to watch your friend reeling in the biggest catch in their life or you wish to test your angling skills and make a great catch possible, there is a trip for you. You will be able to enjoy the view, spot any action going on beneath the surface, and take in all the beauty of the surrounding waters from a flybridge.

Your day out will take you fishing for anything from Mutton Snapper and Kingfish to Black Grouper, Barracuda, Amberjack, Sharks, and Marlin. You will be trolling and live bait fishing for all big game species. Even if the weather doesn't cooperate, Capt. Magnus and his crew will take you to the sheltered waters, where you will be able to try your hand at Jacks, Shark, and Barracuda.

The 'Ultra Grand Slam' is a Concord AMF Brunswick with 47' of excellence. She has been uphauled in 2018 and comes powered by a pair of 450 HP Cummins engines. The Ultra Grand Slam is rigged with latest electronics, technologies, and professional accessories.

All trips come with the use of high-quality Penn International and Shimano tackle, as well as lures. Live bait will be caught on the trip.

Ride in comfort aboard one of the largest charter boats at charter boat row!

Ultra Grand Slam Sport Fishing Charters and Captain Magnus Nilsson invite you down to Key West for an adventure of a lifetime. The company specializes in inshore, offshore, wrecks, and reef fishing trips that are great for seasoned enthusiasts and record-seekers alike.

Captain Magnus loves catching fish and having a great time on the water. The first mate will cater to your every need. We customize our trips to maximize your pleasure.

Whether you want to watch your friend reeling in the biggest catch in their life or you wish to test your angling skills and make a great catch possible, there is a trip for you. You will be able to enjoy the view, spot any action going on beneath the surface, and take in all the beauty of the surrounding waters from a flybridge.

Your day out will take you fishing for anything from Mutton Snapper and Kingfish to Black Grouper, Barracuda, Amberjack, Sharks, and Marlin. You will be trolling and live bait fishing for all big game species. Even if the weather doesn't cooperate, Capt. Magnus and his crew will take you to the sheltered waters, where you will be able to try your hand at Jacks, Shark, and Barracuda.

The 'Ultra Grand Slam' is a Concord AMF Brunswick with 47' of excellence. She has been uphauled in 2018 and comes powered by a pair of 450 HP Cummins engines. The Ultra Grand Slam is rigged with latest electronics, technologies, and professional accessories.

All trips come with the use of high-quality Penn International and Shimano tackle, as well as lures. Live bait will be caught on the trip.

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Customer reviews

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Rating

4.6
37 reviews
4.4
Boat & equipment
4.8
Captain & crew
4.7
Fishing Experience

Anglers' gallery (31)

What anglers say

81%
Recommended

All reviews (37)

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Frequently mentioned
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Showing 15 of 37 reviews
Patrick Clark
Patrick Clark
us
Kansas, US
Member since 2025
0
5.0
Verified
Excellent Experience
Half Day Deep Sea Sportfishing on March 20, 20263 adults
Unbelievable experience. The guys worked hard to catch great fish. Snagged barracuda and king fish. Took fillets downtown to local restaurants for catch and cook that were unreal.
Aaron Pitterman
Aaron Pitterman
Repeat angler
us
California, US
Member since 2020
4 trips
0
5.0
Verified
Great crew!
3/4 Day – Deep Sea Sportfishing on February 21, 20263 adults
We had a great trip. Amazing crew.
Reported catch:
Dolphin (Mahi Mahi)
Response from Captain
February 22, 2026
Thank you Aaron, looking forward to next time.
Chris Brigham
Chris Brigham
us
Massachusetts, US
Member since 2025
0
The captain canceled
December 30, 2025
The charter operator canceled 1 days prior to the trip date. This is an automated posting.
Michael  McDorman
Michael McDorman
us
Indiana, US
Member since 2022
0
5.0
Verified
Full day trip
Full Day – Deep Sea Sportfishing on August 10, 20224 adults
We had a great time and caught a lot of Dolphin. The captain and first mate were awsome . If you want the best boat and crew this is it no need to look any further.
Response from Captain
August 17, 2022
Thank you Michael, it was indeed great fishing with you guys
Jody  Barrera
Jody Barrera
Florida, US
Member since 2021
1
4.3
Verified
Capitan Magnus and Alan
3/4 Day – Deep Sea Sportfishing on August 3, 20214 adults
Both were fantastic!! The fish weren’t biting, but that’s not their fault. The air conditioner didn’t work, but we survived. The boat was clean and water was provided. The only thing we wish is that we could have been a little more involved in the fishing. At times, it felt like we were watching our dinner being caught instead of catching it. Alan was very fun and Captain Magnus was informative on the ride back pointing out local points of interest and just being generally cordial. All in all, great trip and definitely recommend!

Trip availability and prices

Trip Date:
Days:
Group Size:
Select date to see availability
June 2026
SuMoTuWeThFrSa
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Number of days
1
Group Size
2 adults • 0 children
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Almost there...
Half Day Deep Sea Sportfishing
4 hour trip starts at 8:00 AM
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US $950
Entire boat: up to 6 people
3/4 Day – Deep Sea Sportfishing
6 hour trip starts at 8:00 AM
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US $1,200
Entire boat: up to 6 people
Full Day – Deep Sea Sportfishing
8 hour trip starts at 8:00 AM
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US $1,500
Entire boat: up to 6 people
There are 6 people looking at this charter.

Customer reviews

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Rating

4.6
37 reviews
4.4
Boat & equipment
4.8
Captain & crew
4.7
Fishing Experience

Anglers' gallery (31)

What anglers say

81%
Recommended

All reviews (37)

Filter
Frequently mentioned
Loading...Loading...Loading...Loading...Loading...Loading...Loading...Loading...
Showing 15 of 37 reviews
Patrick Clark
Patrick Clark
us
Kansas, US
Member since 2025
0
5.0
Verified
Excellent Experience
Half Day Deep Sea Sportfishing on March 20, 20263 adults
Unbelievable experience. The guys worked hard to catch great fish. Snagged barracuda and king fish. Took fillets downtown to local restaurants for catch and cook that were unreal.
Aaron Pitterman
Aaron Pitterman
Repeat angler
us
California, US
Member since 2020
4 trips
0
5.0
Verified
Great crew!
3/4 Day – Deep Sea Sportfishing on February 21, 20263 adults
We had a great trip. Amazing crew.
Reported catch:
Dolphin (Mahi Mahi)
Response from Captain
February 22, 2026
Thank you Aaron, looking forward to next time.
Chris Brigham
Chris Brigham
us
Massachusetts, US
Member since 2025
0
The captain canceled
Trip was supposed to happen on December 30, 2025
The charter operator canceled 1 days prior to the trip date. This is an automated posting.
Michael  McDorman
Michael McDorman
us
Indiana, US
Member since 2022
0
5.0
Verified
Full day trip
Full Day – Deep Sea Sportfishing on August 10, 20224 adults
We had a great time and caught a lot of Dolphin. The captain and first mate were awsome . If you want the best boat and crew this is it no need to look any further.
Response from Captain
August 17, 2022
Thank you Michael, it was indeed great fishing with you guys
Jody  Barrera
Jody Barrera
Florida, US
Member since 2021
1
4.3
Verified
Capitan Magnus and Alan
3/4 Day – Deep Sea Sportfishing on August 3, 20214 adults
Both were fantastic!! The fish weren’t biting, but that’s not their fault. The air conditioner didn’t work, but we survived. The boat was clean and water was provided. The only thing we wish is that we could have been a little more involved in the fishing. At times, it felt like we were watching our dinner being caught instead of catching it. Alan was very fun and Captain Magnus was informative on the ride back pointing out local points of interest and just being generally cordial. All in all, great trip and definitely recommend!

FAQs about Ultra Grand Slam Sport Fishing

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The fish you can target

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What is the boat like?

Boat image
Boat category
Sportfishing boats
Capacity
6 persons
Boat length
48 ft
Year built
1977
Restored in
2018
Boat manufacturer
Concord AMF Brunswick
Boat type
Sportfishing
Engine model
Cummins
Powered by
2 x 450HP
Max cruising speed
22 knots
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